Run the code, and you’ll see that indeed the list of lists is sorted based on the Age:, ,, , ] In that case, you may use lambda to sort the list of lists for a specific index: people_list = ,] Suppose that you want to sort the list of lists based on the Age column (which has the index of ‘2’). Case 4: Sort a List of Lists for a Specific Column/Index
In the final case below, you’ll see how to accomplish this goal.
You may then apply the following code to sort the list of lists in an ascending order: people_list = ,]Īs you can see, the list of lists will now get sorted based on the first name:, ,, , ]īut what if you want to sort the list of lists on a different column? This is how the list of lists would look like in Python:, ,, , ] You can capture the above dataset in Python using a list of lists: people_list = ,] Now Maria would be the first name, while Bill would be the last: įor example, let’s say that you have the following dataset: Name You’ll see that the list is now sorted in an ascending order, where Bill is the first name to be displayed, while Maria would be the last: Ĭase 2: Sort a List in Python in a Descending OrderĪlternatively, you could sort the list in a descending order by setting reverse = True as captured below: names = You can then sort the list of names in an ascending order by adding names.sort() to the code: names = This is how the list would look like in Python: Let’s say that you created a simple list of names: names = The difference between Tuple and List is that we cannot change the elements of a tuple once it is assigned whereas, in a list, elements can be changed.You may use the following approach in order to sort a list in Python in an ascending order: yourlist.sort()Īlternatively, you may use this syntax to sort a list in a descending order: yourlist.sort(reverse = True)Ĭase 1: Sort a List in Python in an Ascending Order Items = Ī Tuple is a collection of Python objects that written with round brackets and separated by commas. Sort the list by the length of the valuesĪ new function "sortLen" that returns the length of the list elements and add this function as key of sort() function. If you want your own implementation for sorting, you can use key parameter as an optional parameter. The key parameter in sort() method specifies a function that will be called on each list item before making comparisons.
It is because Python treats all Uppercase letters to be lower than Lowercase letters, if you want you can change it. If any of the list element is Uppercase, let's see what happens.
key - A method to specify the sorting criteria (Optional).reverse - Default is reverse=False, while reverse=True will sort the list descending.(Optional).When we pass reverse = true, then the list gets sorted in the descending order. When we call sort() method, it traverses the list elements in a loop and rearranges them in ascending order when there are no arguments. The sort() method performs the sorting of list elements in ascending, descending or user defined order. Also, the list type implements the sequence protocol, so it allows you to add and remove objects from the sequence.
you can have integer, float and string items in a same list. List is a compound data type which means you can have different data types under a list, for ex.
It can holds a number of other objects, in a given order. Python list is a collection which is ordered and changeable.